Question: Who is the fictional person that is present in the work of Macbeth?
Paraphrase: Which fictional character is in Macbeth?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P1441 wd:Q130283 . ?sbj wdt:P31 wd:Q15632617 } 
Answer: Banquo, Lady Macbeth, Macduff, Donalbain, Lady Macduff, Macduff's son, King Duncan, Malcolm, Young Siward, Third Murderer